Preheat oven to 180°C.
Cut baking paper into 18 strips 15 x 2 cm.
Line six 125 ml (1/2 cup) muffin tins with the strips, in a cross pattern with strips overlapping on each side. This will create little handles to remove your gratins with.
Place all ingredients in a bowl and toss to combine.
Layer the potatoes in the muffin tins and pour over any remaining liquid.
Place in the oven and cook for 25-30 minutes or until golden brown.